Ignition dynamo



F. REIS IGNIT ION DYNAMO Dec. 6, 1931"?s Filed April ll, 1929 2SheetS-Shee Shy NN 0a@ r W95/ks',

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attenta@ Dec. 6, 1932. c. F. REIS 1,889,878

IGNITION DYNAMO Fild April 11, 1929 2 sheets-sheet 2 Patented Dec. 6,1932 UNITED STATES PATENT OFFICE CURT FREDERICK REIS, OF CHICAGO,ILLINOIS, ASSIGNOR 10 EXCEL MAGNETO COMPANY, F CHICAGO, ILLINOISIGNITION Application led April 11,

This invention relates to an ignition dynamo or magneto.

An object of the invention is to devise a magneto of simplifiedstructure wherein the parts may be easily assembled and dismantled.

A further object of the invention is to devise an ignition magneto inwhich the high tension circuits are associated on a common insulatingmember which may be readily removed for inspection and repairs, andwherein allnecessary connections are automatically completed uponplacing the member in position.

Still another object is to devise a magneto structure in which theinterrupter mechanism is formed as a unitary structure readily removablefrom the magneto casing, and wherein the electrical connections theretoare completed by the simple act of placing the unitary structure inproper position.

My invention is illustrated in the accompanying drawings in which:

Figure l is a sectional. view of my improved magneto taken in a verticalplane passing through the axis of the rotor element;

FigureV 2 is an end view of my magneto with parts broken away to showthe internal construction Figure 3 shows the manner in which the rotarydistributor element is mounted upon its supporting spindle; and

Figure il; is a perspective view of the insulating block on which thehigh tension circuits are arranged.

Referring to Figure 1, A is the magneto casing which is preferably avcasting of any suitable metal. The casing A is provided with acylindrical recess near the bottom for receiving the rotor element B,the left end of which is liournaled in a wall of the casing by suitableball-bearings. The rotor recess is open at the right end, and anend-plate C is provided for the right end of the casing A. The right endof the rotor shaft is journaled in a ball-bearing supported by end-plateDYNAMO 1929. Serial No. 354,343.

C. The rotor is of the permanent magnet type, with the pole faceslocated at the left end of the rotor. The magnetic circuit for the rotoris completed by a pair of upright magnetic members D extending upwardlyinto an elongated recess located in the upper part of casing A. Themagnetic members are joined together at the upper end by a core member Earound which is wound the customary primary and secondary windings en-Aclosed in a casing W. A distributor gear F is mounted in a shallowrecess formed in t-he right end of casing A immediately above the rightend of rotor B. The rotor carries the driving gear G engaging anddriving the distributor gear F. The gear F is secured to a hollowspindle H journaled in a bushing J which is suitably secured in casing Aby screw K. On the inner end of spindle H, and within the upper recess,is secured a rotary distributor element L, which comprises a disc madeof insulating material and provided with a bearing cone L which issecured to spindle H by means of a screw M. The upper recess of casing Acontaining winding casing W and rotary member L, is provided with acover N comprising a block of molded insulating material having anextension N interposed between the inductor windings W and the rotarydistributor element L. EX- tension N is provided with a conductingmember P serving to establish electric connection between a springelement iV connected to the free end of the secondary winding (notshown) and a rotary contact arm Lc cooperates with a number ofstationary distributor contacts L1, L2, L3, L4, L5 and L6, respectively,mounted on the extension N (see Figure 4). These stationary contacts areconnected respectively to ignition wires 1, 2, 3, 4i, 5 and 6 leading tothe engine spa-rk plugs. The rotary member L is also provided with abooster ring BR which is connected to a contact BR mounted on the faceof member L approximately from the rotary contact Le. This ringcooperates with a lead 7 for booster operation when desired. As shown inFigure 3, spindle I-I is provided with a pin H for properly positioningrotary member L upon the spindle.

rThe construction of insulating cover N is such that the variouselectric connections between the inductor windings and the rotarydistributor, and between the rotary distributor and the ignition leads,are automatically completed by the simple operation of placing the coverin position.

End-plate C is provided with a circular recess C concentric with therotor shaft. Within this recess is mounted an interrupter mechanismcomprising a circular frame member 8 provided with a central opening 8cfor the reception of the end of the rotor shaft. A spring washer 8b isinterposed between the frame 8 and the bottom of the recess surroundingthe end of the rotor shaft. rEhe frame 8 has sliding engagement with thecircular recess, and is held in the recess by a screw 8c, secured to theframe 8 and the head of which engages a bayonet slot 9 formed in thebottom wall of the recess C (see Fig. 2). Spring member 8b serves toprevent vibration of the 'frame member. A U-shapcd contact arm 10 ispivoted at 10a to the frame 8 and carries at one end a movableinterrupter contact 10?). At the other end there is provided a fiberinsert 100 for engagement with a cam 11 carried on the end of the rotorshaft. Secured to frame 8 near its periphery is an insulated metallicsector 12 provided with a stationary interrupter contact 12a cooperatingwith movable contact 10?). A spring element 10d is provided to bias themovable contact 10b against the stationary contact 12a.'

It will be understood that cam 11 operates to periodically open theinterrupter contact by engagement with the liber insert 10c carried inone end of contact arm 10.

The electric connection between the pri mary inductor winding .and thestationary interrupter contact, is completed as follows:

It will be understood that one `end of the primary winding is groundedin the usual manner. The other end is brought out to a terminal 13, andfrom there a conductor 18a leads to an insulated spring-pressed plunger14 mounted in the right end of the casing A, 1

and arranged to engage an insulated Contact block 15 carried byend-plate C. Contact block 15 is provided with a contact arm 15a (seeFig. 2) the free end of which passes through an opening in the side wallof the circular recess containing the interrupter and engages theinsulated sector member 12 carrying the stationary interrupter contact.

The movable interrupter Contact is, of course,

grounded to the rotor and to the frame C; thus a circuit is completedthrough the primary winding and the interrupter contacts.

A condenser 16 is carried in end-plate C justextend of slot 17 a.

above contact block 15. One terminal of this condenser is grounded toend-plate C, and the other terminal is connected to terminal block 15 bya connection 16a; thus the condenser is effectively connected in shuntto the interrupter contact.

End-plate C is provided with a cover 17 for the recess containing theinterrupter mechanism. The outer periphery of cover 17 is provided witha slot 17 a into which eX- tends a pin 18 secured in end-plate C. Theframe 8 of the interrupter mechanism is provided with a pin 19 whichextends into a seat formed in the cover 17 and locks the interrupterframe to the cover. The cover`17 is providedr with a handle 17h (shownin dotted lines in Fig. 2) whereby the cover, and therefore, theinterrupter mechanism, may be rotated through an angle determined by theIn this way, the operation of the interrupter contacts maybe advanced orretarde It will be observed that the interrupter mechanism is made inunitary structure which may be inserted and removed from the recessformed in end-plate C simply by a bayonet slot connection, and thenecessary electric connections are automatically made upon insertion ofthe mechanism.

It will also be noted, that end-plate C with the apparatus mountedthereon is made in a unitary structure which is easily removed from thecasing A, and all necessary electric connections are automatically madeupon` placing the end-plate in its proper position.

From the foregoing description and the accompanying drawings it will beseen that I have devised a simplified construction of magneto which maybe readily assembled and dismantled, that the high tension circuits areassociated on a common insulating member,

that all necessary connections are automatically completed upon placingtlie insulating member in position, and that the interrupter.

myself or the scope of the invention, as many. changes and modicationsmay be made without departing from the spirit of the invention; all suchI aim to include in the scope of the appended claims.

W hat I claim as new and desire to secure.

by Letters Patent is:

1. In an ignition dynamo, a casing provided with an elongated recess, arotor journaled in said casing` adjacent said recess, an

inductor winding mounted in'said recess at.. one end, a distributormechanism mounted in said recess at the other end, and a detachablemember interposed between said winding and said distributor foreffecting connections between said elements, said member embracing saidwinding ancforming a top closure for said recess.

2. In an ignition dynamo, a rotor having a shaft, a casing thereforhaving an elongated recess parallel to said rotor, an inductor vindiii gmounted in said recess adjacent one end of the rotor, a rotarydistributor mechanism mounted in said recess adjacent the other end ofthe rotor, means for driving the distributor from the rotor shaft, acover for said recess having an extension interposed between saidwinding and said rotary distributor element, stationary distributorcontacts mounted on said extension and cooperating with the rotarymember, and means carried by said extension for effecting electricconnection between said winding and said rotary member.

8. In an ignition dynamo, a casing provided with a recess, an inductorwinding mounted in said recess, a rotary distributor element mounted insaid recess in spaced relation to said winding, a cover for said recesshaving an extension interposed between said winding and said rotaryelement, means carried by said extension for eifecting circuitconnections between said winding and said rotarj,7 element, andstationary distributor contacts carried by said extension andcooperating with said rotary member.

4. In an ignition dynamo, a rotor having a shaft and a casing therefor,a detachable end plate for said casing, an interrupter mechanism carriedin a recess in said end plate, means for operating said interruptermechanism from the rotor shaft, and separable Contact elements mountedon said casing and said end plate respectively, the contact element onsaid casing being connected to an inductor winding and the contactelement on said end plate being connected to an interruptor contact,whereby said electric connection is completed upon properly positioningsaid end plate.

5. In an ignition dynamo, a rotor having a shaft and a casing therefor,said casing having a circular recess formed adjacent one end of saidrotor shaft, an interrupter mechanism supported within said recess upona shiftable frame, a cam on the rotor shaft for operating theinterrupter, said interrupter comprising a movable Contact element, anda stationary contact element carried by Said frame, and flexible contactmember carried by the end plate of said casing and extending into saidrecess in engagement with said stationary contact element.

6. In an ignition dynamo, a rotor having a shaft and a casing therefor,said casing having a circular recess 'formed at one end 0f said rotorshaft, an interrupter mechanism supported within said recess upon ashiftable frame, a cam on the rotor shaft for operating the interrupter,said interruptor comprising a movable Contact element, and a stationarycontact element carried by an insulated sector of said frame, and aflexible contact member carried by the end plate of said casing andextending into said recess in engagement with said insulated sector.

CURT FREDERICK REIS.

Cil

